Also note that some chain breaker manfacturers recommend that when breaking #520 or larger drive chain, it is recommended to grind off the rivet heads first. This will significantly reduce the load on the tool and help prevent premature wear or damage to the breaking tips.

 

yes, I didn't listen and managed to jam the pushing pin of the tool into th chain and ht to use a sawzall to cut it all apart. now I need replacement parts for the tool next time I need to break a chain

 

I just wanted to tell everyone thanks for the help! My new chain is on and bike is like new as far as that goes.

 

glad to hear it all worked out